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C. M. LUNGREN.

" RBGBLTBRATIVE GAS LAMP.

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NITED STATES PATENT Ormea.

CHARLES M. LUNGREN, or New YORK, N. Y.

j REGENERATIVE GAS-LAM P.

SPI-265iFMEATJIQN'forming part of Letters Patent'N'o. 347,622, dated August 17, 1886,

Application filed February 20, 1:86. Serial No. 192,633. (No model.)

To all whom, it may concern:

Be it known that I, CHARLnsM. LUNGREN, a citizen of the United States, and a resident of New York, in the county of New York and State of New York, have invented a certain new and useful Regenerative Gas-Lam p, of which the following is a specification.

The object of this invention is to provide an improved construction of regenerative gaslamps of the type in which the air to supply the interior of the flame is introduced into it through passages leading` across the escapeflue. The great diiiiculty experienced with lamps of this form has been the clogging up of the gasburncr 'portion of the apparatus by overheating. In the present lamp I remedy this defect by placing the gas-burner below the lame and arrange air-passages around and through it in such relation to the external air that the gas burner and tip are bathed by currents of comparatively cool air. The highlyheated air conveyed through the passages crossing the escape-flue and the air-heating chamber within the flame does not come in contact with the burner or tip, but is thrown upon the flame at a point above the tip.

In the drawings, Figure 1 shows a lamp, partly in elevation and partly in vertical section, embodying my improved construction. Fig. 2 shows a plan of the gas-burner below the line VV, and Fig. 3 a cross-section on the line X Y of the air cross-tubes. Fig. Ltshows a modification of certain details.

In Fig. 1,0 is an annular gas-burner,shown as consisting of two concentric cylinders itting in the ring G', which is attached to the central gas'supply pipe by three arms, g. This part of the lamp may be constructed of a ring of tubes, if desired, and the gas may burn from perforations or a slitlocated either on the top of the burner, as shown in Fig. 1, or around its periphery at its upper end, as shown in Fig. 4.

In suspended lamps it is preferable, on account of compactness and cheapness of construction, to carry the gassupply pipe G up through the center of the burner and escapeflue; but this pipe may enter the burner at or near its lowerend atthe sides or directly from below. When a center suspension-pipe is used, thel stop-cock S may be placed in the 'provided with a w'hitencd surface. is inclosed in a glass globe, H,which may rest,

direct the cnrrentsof air passing up through the center of the burner and passing down th rough the air-heating chamber A. This deflector need not be a separate piece, but may be formed by the lower surface of the perforated metal piece a, as shown in Fig. 4. The air to supply 'the interior of the flame is admitted th rough passages r, which are arranged across the escape-fine. From the passages .it passes downward into a chamber, A, located within the ilame, from the lowerv end of which it issues upon the flame, preferably through a numberof iine apertures, such as are provided by a suitably-shaped piece, a, of perforated metal.

The cross air-passages and the outer and inner walls of the escape-tine are preferably cast in one piece, and the whole structure may be designated,to distinguish it from the air-chamber A^,the regeneratoix77 Thisis shown in vertical seetion at R in Fig. l and in cross-section in Fig. 3. A downward cylindrical extension, R2, serves to continuethe air-channel down to the air-chamber A. This latter,being within the dame, is preferably constructed of a material having a white reflecting-surfaeesuch as porcelain-though it may be made of metal The dame as shown, upon a cylindrical casing, E, which in turn rests upon the casing E2 by means of three offsets, e, which are turned inwardly, as shown in Fig. 3, the bead upon the lower end of Ez being cut away in three points, (not shown,) to allow E to be removed for taking off the glass.

To protect the glass from the heat of the flame, the opening of the escape-due is arranged some distance inward from the edge of the globe, and a current of air is allowed to enter between the neck of the globe and vthe wall .I of the escape-lue,which serves to keep IOO the globe-neck cool,and to aid in sweeping the tips ofthe llame inward away from the glass and into the escape-Hue. A casing, I, surrounding the regenerator serves to protect the ends of the cross-passages r from drafts.

H is the chimney; 1P, a sheathing, which may be of ornamental design, and P, an ornamental crown.

In my application No. 192,632, filed February 20, 1886, are exhibited some ofthe elements shown and described in this application. My present claims are therefore limited to the constructions and organizations of devices set forth at the end of this specification.

\Vhat I claim as my invention is 1. The combination of an annular burner having an air-passage through it, which passage communicates with the external air at its lower end, an air-heating chamber located above the burner-tip and having an outlet for air at its lower end and an inlet for air at its upper end, an air passage or channel leading across the escapelue and communicating with the upper end ofthe air-heating chamber, an inclosing-globe, an escape-flue, the inlet end of which surrounds thc upper end of the airheating chamber, and an air-passage between the wall ofthe escape-flue and globe, substantially as specified.

2. The combination of an annular burner having an air-passage through it, which passage communicates with the external air at its lower end, a defiector arranged above the burner-tip, an air-heating chamber located above the dellector, and having an outlet for air at its lower end and an inlet for air at its upper end, an air passage or channel leading across the escape-flue and communicating with the upper end of the air-heating chamber, an inclosing-globc, an escape-flue, the inlet end of which surrounds the upper end of the airheating chamber, and an air-passage between the wall of the escape-flue and globe, substantially as specified.

3. rlhe combination of an annular burner having an air-passage through it and an aircasin g around it,both of these passages communicating with the external air at their lower ends, an air-heating chamber located above the burner-tip, and having an outlet for air at its lower end and an inlet for air at its upper end, an air passage or channel leading across the eseape-flue and communicating with the upper end of the air-heating chamber, an inclosingglobe, an escape-flue, the inlet end of which surrounds the upper part of the airheating chamber, and an air-passage between the wall of the escapellue and the globe, sul stantially as specified.

4. The combination of an annular burner having an air-passage through it, which pas sage communicates with the external air and at its lower end a central gas suspension-pipe, an airheating chamber surrounding the central gas-pipe and located above the burner-tip, said chamber having an outlet for air at its lower end and an inlet for air at its upper end, an air passage or channel leading across the escape-liuc and communicating with the upper end ofthe air-heating chamber, an inclosing-globe, an escape-Hue, the inlet end of which surrounds the upper part of the airheating chamber, and an air-passage between the wall of the escape-flue and the globe, sul stantially as specified.

Signed at Philadelphia, in the county of Philadelphia and State of Pennsylvania, this 18th day of February, A. D. 1886.

CHARLES M. LUNGREN.

Vitlnesses:

ALBERT W. Cox, EDWARD S. MolN'rYRE. 

